MTPS I CA CWS I Cooling Tower II Overhauling of Flow Control Valves and including reconditioning of worn out spares during AOH 2022 2023 of Unit II

Amount

Charges for reconditioning of worn-out Flow Control Valve (FCV) spares released from Cooling Tower –II at outside workshop, boring of worn-out GI Disc, fabrication and assembling of M.S. flange on CI Disc, molding of new CI guide bush, boring and thread cutting on the inner surface of the bush to suit with the existing S.S. Stem. Reconditioning of worn-out S.S.Stem by thread cleaning and provide S.S. stem end nut and two Nos plate washers per stem, including the transporting charges.

Charges for removing the existing damaged Nitril rubber from the M. S Flange in Cooling Tower . Cleaning and sand blasting on both the surface for Nitril rubber impregnation, moulding the Nitril rubber over the flange for 5 mm thick on each side ( the size of the flange to be impregnated is OD-640mm; ID-450 mm) trimming and steam vulcanizing ,including the cost of Nitril rubber, adhesive and also charges including transporting charges of worn- out spares from MTPS to out side work shop and return back to MTPS

Charges for dismantling of inspection doors provided at Flow Control Valve assembly casing . Dismantling of Flow control valve assembly ( about300 kg weight) from taping pipe flange of hot water header line. Reassembling the same by using Rubber gasket properly without water leakage. Open/close operation checking works.(Cooling towers of Paharpur make Model 1514-11 )

Charges for Dismantling of Flow control valve spares from Flow Control Valve assembly, cleaning, inspection and renewal of worn-out spares like guide bush, stem, CI disc, lock nut, locking bar and operating handle etc. and reassembling the Flow Control Valve assembly (Cooling towers of Paharpur make Model 1514-11

Charges for reconditioning Flow control valve casing for fixing inspection doors by Drilling and removal of existing 8 Nos of eroded M10 / M12 stud, making 8 Nos of new M 10 / M12 thread on the valve body by using tap set.(Cooling towers of Paharpur make Model 1514-11 )

Charges for leading, lifting, positioning and inserting the stop log gate in the cold water Outlet canal of CT to facilitate the cold water dewatering work. After completion of dewatering work removing , leading and placing the stop log gate on the floor

Charges for dismantling the GI casing of FC valve to facilate the OH of FCV & renewal of nozzles etc., and assembling back after completion of work in CT-II

Cost of Neoprene Rubber(Black) Gasket ,size,1M X 2 M X5 MM thick for SL.No.3

Cost of Material charges for C.I guide bush, M.S. Flange, S.S. Stem end lock nut and plate washers including transporting charges for SL.No.1

Cost of Nitril rubber of 1.25 kg required for 1Nos of disc for SL.No.2

Charges for Nitril rubber impregnation, moulding and covering 5 mm thick on both faces of M.S. Flange, trimming and steam vulcanizing for 1 No for SL.No.2

Cost of Consumable and T&P for SL.No.1 to 7

SS ENGINEERING CONTRACTOR